Nothing prevents you from working with liked minded individuals to create your own "infra". The phrase "we the people" sounds cool but in reality what you mean is "your money, my idea".

Roads is a very common argument, but none of the roads are build by "we the people". Government takes your money by force irrespective of how you think it should be spent and then a completely unaccountable red tapy system that employs otherwise unemployable people decides how to spend it. After a massive waste you have some roads which are poorly built even worse maintained.

There is no need for roads to be public infrastructure. It can be fully privatized and people be asked to pay for its use. (While entire compontent of taxes that go towards road building be returned back to the people.)

We will have better roads, less traffic and more money in pocket with that model.